An algae bloom is normal and shows your tank is settling well and will clear in time. If you want you could get a bristlenose plec to clean the glass if the water isnt too cold.
dont panic.
Your tank is still cycling and fluctuating. You have to though keep on top of ammonia and nitrite and dont let them get above 1. If it means you have to do water changes two or three times a day then thats what you have to do. For now do an immediate 50% and test again after an hour. If its still above 1 then do another 50% and so on.
The reason I only did a 30% WC is that I only have that amount over 'aged' water.... I fill the bucket when I do the WC's & leave it 2 days. If I do an immediate 50% it will have to be from the tap!!! Yes I have conditioner but what about the temp? The water's cooooold down here in Yorkshire straight from the tap...